Steam-boiler.



Patented .T une 23, 1903.

PATENT OFFICE.

ROBERT W.BARTON, OF CHICAGO, ILLINOIS.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent N o. 731,657, dated J une 23, 1903.

Application filed March 2, 1903.

`.To all whom t may concern:

Be it known that I, ROBERT W. BARroN,a citizen of the United States, `residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Boilers; and I do declare `the following to be a full, clear, and eX- act description of the invention, such as will enable others skilled in the art to which it fappertains to make and use the same.

My invention relates to improvements in steam-boilers of the type known as flash- `boilers; and it consists in the construction and arrangement of devices hereinafter de- "scribed and claimed.

This invention is an improvement on the steam-boiler described and claimed in Letters Patent of the United States No. 719,420,

granted to me February 3, 1903.'

In the device of my invention a quantity of water within the boiler commensurate with the amount of steam that is being involved is y forced to thus circulate by y my improvements. of the same.

`higher to a lower coil.

In the accompanying drawings, Figure lis a side elevation of a steam-boiler embodying Fig. 2 is a top plan View In the embodiment of my invention here Serial No. 145,750. (No model.)

shown the superposed coils of the tube or tubes are disposed in alternate layers d b, each upper layer a being spiral in form and each lower layer b being of angular form. This construction and disposition of the coils may be varied or departed from within the scope of vmy invention, and I do not desire to limit myself in this particular. To prevent the water supplied at c from gravitating through the tubes, I provide certain of the layers or coils with vertical riser offsets d, disposed eX- teriorly of the general mass of coils and formu ing water-traps, the `upper portions of which are all at the same level. These traps are formed at the points where the spiral layers ct join the angular interposed spacer layers b, as shown.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is`

l. A boiler of the class described, having alternately-disposed spiral coils and angularly-formed spacer-coils, and water-traps at the points where said coils communicate with each other.

2. A boiler of the class described, having alternately-disposed spiral coils, and angularly-formed spacer-coils, and watertraps, ex-

terior of the mass of coils and at the points Where the spiral and spacer coils communicate with each other. g5

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ROBERT WV. BARTON.

Vitnesses MILLARD E. MoZY, WM. A. THIRLWALL. 

